/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package org.apache.streampipes.pe.flink.processor.count;

import org.apache.streampipes.model.runtime.Event;

import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.api.java.tuple.Tuple3;

public class CountMapper implements MapFunction<Event, Tuple3<String, String, Integer>> {

  private String fieldToCount;

  public CountMapper(String fieldToCount) {
    this.fieldToCount = fieldToCount;
  }

  @Override
  public Tuple3<String, String, Integer> map(Event stringObjectMap) throws Exception {
    return new Tuple3<>(fieldToCount, stringObjectMap.getFieldBySelector(fieldToCount)
        .getAsPrimitive().getAsString(), 1);
  }
}
